It's your last chance to get to know Kyle XY this week, and your second-to-last chance to discover Jericho before it goes away, maybe forever. Those both happen to be shows that I really disliked when they started, and they've both grown on me a lot. Meanwhile, Smallville features Chief Tyrol in full crazoid mode, and Lost has a script co-written by Brian K. Vaughan (Y: The Last Man). Click through for clips and full listings.

Tonight is the season finale of Kyle XY on ABC Family at 8. It's all about the senior prom, which looks chock full of heartwarming, judging from the trailers I've seen. At the same time, this show about a superpowered teen mutant has done a really great job of keeping a sinister undercurrent lately, and Kyle's female counterpart Jessi just gets more and more entertainingly psycho. So if you haven't checked it out yet, you may want to grab your last chance tonight. After all, the episode will also teach us that looking forward to your prom too much will turn you gay:

Also, the History Channel has a new Modern Marvels, about whiskey, at 8 PM. (Not really very science fictional, but maybe the whiskey is sentient?) And then a new Cities of the Underworld at 9 PM.

And Encore is showing Mission To Mars at 9:45, just in case you want to relive Gary Sinise's life-changing encounter with a cheesy CGI alien.

Tuesday night has the next-to-last episode of Jericho season two, on ABC at 10 PM. Sadly, this is looking more and more like the next-to-last episode of Jericho, period, unless the Sci Fi Channel decides Jericho is a better investment than another season of Ghost Hunters. As you'd expect, Major Beck is not terribly happy about the drastic actions that Stanley took at the end of the previous episode, and he's not willing to blame everything on New Bern. Here are the first five minutes of the episode. (I apologize for the streaky video, this is the best source I could find.)

Also, the History Channel has a rerun of The Universe, all about the possibility of life on Mars.

And Encore has back-to-back Aliens and Waterworld, starting at 11:40 AM.

And at 2:10 AM Wednesday morning, Encore has Ultraviolet, the second-best movie featuring Gun-Kata. (The first being director Kurt Wimmer's Equilibrium, of course.)

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Wednesday, the Discovery Channel has a new Futureweapons, "Hard Target." Subjects include new inflatable armor, shoulder-fired grenades, and the A-10 Thunderbolt II attack plane. Good times! And at 10, the History Channel has a new UFO Hunters, "UFO Gateways." The Hudson Valley in New York has hosted more than its fair share of UFO sightings — could this area be an interstellar gateway, used to travel across time and space, or even between dimensions? Another possible gateway area is Sedona, Arizona.

And at 10:10, Encore has Alien 3, while FX shows Batman Begins at 5, followed by The Core at 8 and 11.

Thursday there's a new Smallville on The CW at 8. Lionel Luthor has Clark abducted, and there's some crazy prophecy about how The Traveler will change the Earth for ever. But the main reason to watch this episode is to see just how crazy Chief Tyrol has gone since a certain revelation at the end of Battlestar Galactica season three. Here's a clip:

And then there's a new Lost, on ABC at 9, where we find out what Michael's been up to all this time. And Ben tries to convince Alex to flee the Others' camp before a coming assault. We posted a couple of preview clips the other day, and here's the episode's promo:

And at midnight, A&E has The Matrix, while Encore has 12 Monkeys. Try flipping back and forth between the two movies to create a single, crazy-paranoid narrative where nothing is real. And at 1:30 Saturday morning, TBS has Mars Attacks!, followed by Eight-Legged Freaks at 3:45.

Saturday morning, The CW has Legion of Superheroes followed by Spectacular Spider-man (featuring the debut of the Lizard), starting at 9:30.

And then at 9 PM, there's a new Torchwood on BBC America. It's Gwen's wedding day, but unfortunately, she's got a little surprise on the way. Zany wedding-pregnancy action, plus creepy monsters. You can read our recap of the episode here.